CN109921836A - The determination method, apparatus and storage medium of channel detection - Google Patents
The determination method, apparatus and storage medium of channel detection Download PDFInfo
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Abstract
Disclose the determination method, apparatus and storage medium of a kind of channel detection.This method comprises: wireless access point executes the first channel detection to site STA；Wireless access point executes second channel detection to STA after executing the first channel detection, wherein, the probe interval executed between the time for executing time and second channel detection of first channel detection and channel matrix variation are negatively correlated, channel matrix changes the variation between the first channel matrix and second channel matrix, first channel matrix is that wireless access point executes what the first channel detection obtained, and second channel matrix is what the channel detection that wireless access point executes before the first channel detection obtained.It can determine the reasonable channel detection period.
Description
Technical field
The present invention relates to the determination method, apparatus and storage medium of field of communication technology more particularly to a kind of channel detection.
Background technique
In WLAN (English: wireless local area network, WLAN), access point (English:
Access point, AP) between website (English: station, STA) can using multi-user-multiple-input and multiple-output (English:
Multi-user multi input multi output, MU-MIMO) mode by beam forming (English:
Beamforming) technical transmission data.Beamforming technology can make AP use mutiple antennas to multiple STA in the same time
Send polymerisation medium access-control protocol data cell (English: aggregated medium access control
Protocol data unit, AMPDU), to improve the utilization rate of channel and the data throughout of WLAN.
TxBF technology includes explicit TxBF technology.The course of work of explicit TxBF technology include channel detection (English:
Sounding) and data transmit two stages.In the channel detection stage, AP can send ultra-high throughput by receiving each STA
(English: very high throughput, VHT) compression beam forming (English: compressed beamforming) movement
Frame (English: action frame) obtains the beam forming feedback matrix (English: beamforming feedback of each STA
Matrix the channel matrix (English: channel matrix) of each STA), and then based on beam forming feedback matrix is obtained, as
Multiple-input and multiple-output (English: multi input multi output, MIMO) channel matrix of each STA.Rank is transmitted in data
Section, AP aggregate into the data packet of multiple STA after one AMPDU is transferred to physical layer, and physical layer is to STA's each in AMPDU
The channel matrix for each STA that data are obtained by the channel detection stage is modulated, and is then sent to each STA.
By the course of work of above-mentioned explicit TxBF technology it is found that AP to execute the time that channel detection is spent more, AP with
The efficiency that data are transmitted between STA is lower, so AP is it needs to be determined that the reasonable channel detection time, to reduce channel detection to the greatest extent
The time of cost.
Summary of the invention
This application provides the determination method, apparatus and storage medium of a kind of channel detection, can determine reasonable channel
Detection time.
In a first aspect, this application provides a kind of determination methods of channel detection, comprising: wireless access point executes STA
First channel detection.The wireless access point executes second channel to the STA after executing first channel detection and visits
It surveys.Wherein, the probe interval executed between the time for executing time and second channel detection of first channel detection
Change with channel matrix negatively correlated.The channel matrix changes the variation between the first channel matrix and second channel matrix.
The first channel matrix wireless access point executes first channel detection and obtains, and the second channel matrix is
What the channel detection that the wireless access point executes before first channel detection obtained.
In the application, wireless access point determines first according to the variation between the first channel matrix and second channel matrix
The probe interval executed between the time for executing time and second channel detection of channel detection.The variation feelings of channel matrix
Condition illustrates the stable case of channel between AP and STA, and the variation of usual channel matrix is bigger, illustrates and believes between AP and STA
The stability in road is lower, needs to carry out channel detection in time；The variation of channel matrix is smaller, illustrates channel between AP and STA
Stability it is higher, can suitably postpone execute second channel detection time, so the execution time of the first channel detection and
The probe interval of second channel detection executed between the time and channel matrix variation are negatively correlated.In such the application, wirelessly connect
In the period that access point is detected according to the situation of change realtime adjusting channel of channel matrix, it ensure that the reasonability of channel detection time.
With reference to first aspect, in the first embodiment of first aspect, the channel matrix variation is described first
Variation in channel matrix in Partial Elements and the second channel matrix between element corresponding with the Partial Elements position.
With reference to first aspect or the above embodiment of first aspect, in second of embodiment of first aspect,
The wireless access point executes site STA after the first channel detection, further includes:
The wireless access point sends data to the STA using the mode of MU-MIMO.
With reference to first aspect or the above embodiment of first aspect is gone back in second of embodiment of first aspect
Include:
When channel matrix variation is greater than preset threshold, the wireless access point stops using the mode of MU-MIMO
Data are sent to the STA.
Second aspect, this application provides a kind of determining devices of channel detection, comprising: probe unit, for being held to STA
The first channel detection of row；The probe unit is also used to execute second to the STA after executing first channel detection
Channel detection, wherein the spy executed between the time for executing time and second channel detection of first channel detection
It surveys interval and channel matrix variation is negatively correlated, the channel matrix variation is between the first channel matrix and second channel matrix
Variation, the first channel matrix wireless access point execute first channel detection and obtain, the second channel
Matrix is what the channel detection that the wireless access point executes before first channel detection obtained.
In conjunction with second aspect, in the first embodiment of second aspect, the channel matrix variation is described first
Variation in channel matrix in Partial Elements and the second channel matrix between element corresponding with the Partial Elements position.
In conjunction with second aspect or the above embodiment of second aspect, in second of embodiment of second aspect, also
Include:
Transmission unit, for when the channel matrix variation be greater than preset threshold when, stop using the mode of MU-MIMO to
The STA sends data.
The third aspect, this application provides a kind of wireless access point, comprising: processor, memory and transceiver.
The processor is used to execute the first channel detection to STA by the transceiver；And for described in the execution
Pass through the transceiver after first channel detection and second channel detection is executed to the STA, wherein first channel detection
The probe interval executed between the time for executing time and second channel detection and channel matrix variation it is negatively correlated, it is described
Channel matrix changes the variation between the first channel matrix and second channel matrix, and first channel matrix is described wireless
Access point executes what first channel detection obtained, and the second channel matrix is the wireless access point in first letter
What the channel detection executed before road detection obtained.
In conjunction with the third aspect, in the first embodiment of the third aspect, the channel matrix variation is described first
Variation in channel matrix in Partial Elements and the second channel matrix between element corresponding with the Partial Elements position.
In conjunction with the third aspect or the above embodiment of the third aspect, in the first embodiment of the third aspect, institute
Processor is stated to be also used to stop using MU-MIMO by the transceiver when the channel matrix changes and is greater than preset threshold
Mode to the STA send data.
Fourth aspect, the embodiment of the present invention provide a kind of computer readable storage medium, in computer readable storage medium
It is stored with instruction, when run on a computer, so that computer executes method described in first aspect.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention
Attached drawing is briefly described.
Fig. 1 is the network architecture schematic diagram provided according to embodiments of the present invention；
Fig. 2 is a kind of schematic flow chart of the determination method for channel detection that an embodiment provides according to the present invention；
Fig. 3 is a kind of schematic block diagram of the determining device for channel detection that an embodiment provides according to the present invention；
Fig. 4 is a kind of schematic block diagram of the determining device for channel detection that an embodiment provides according to the present invention；
Fig. 5 is a kind of schematic block diagram for channel detection locking equipment really that an embodiment provides according to the present invention.
Specific embodiment
In the absence of conflict, the features in the embodiments and the embodiments of the present application can be combined with each other.
The embodiment of the present invention can be used for the determination scene in channel detection period.As shown in Figure 1, making for the embodiment of the present invention
A kind of network architecture schematic diagram.In the network architecture shown in Fig. 1, AP110 and can be wirelessly connected with multiple STA, in Fig. 1
Show 4 STA, respectively STA101, STA102, STA103 and STA104, wherein STA101 and STA102 set for terminal
Standby, STA103 and STA104 are the network equipment, for example, interchanger, router etc..AP110 may include processor and transceiver,
Processor can carry out data processing, can also by transceiver transmitting/receiving wireless signal, for example, detect the channel of each STA, to
STA transmits data etc..Transceiver may include multiple radio circuits and the antenna that connect respectively with multiple radio circuits, processing
Chip is connect by interface with radio circuit.AP110 supports MU-MIMO technology.
It is transmitted in data procedures between wireless access point and STA, due to factors such as website movement, interference variations, wirelessly
Channel between access point and website may change, then channel matrix can also change, so wireless access point is every
Every just needing to execute channel detection to website for a period of time, in order to be able to get between wireless access point and website accurately
Channel matrix.In the embodiment of the present invention, between the execution time of wireless access point channel detection twice adjacent to website
Every referred to as probe interval.In the embodiment of the present invention, probe interval can be with the variation feelings of channel between wireless access point and website
Condition is adjusted.
Wireless access point is after this executes channel detection to website, and channel may be compared between wireless access point and website
It does not change or changes in for a long time and is smaller, i.e., channel is in a long time between wireless access point and website
Stable state, high stability, then at this time within the long period, wireless access point executes the channel matrix that channel detection obtains
It does not have a greater change, then wireless access point can postpone the time for executing channel detection next time, that is, increase the spy of this secondary channel
Survey and next time probe interval between channel detection.Wireless access point is after this executes channel detection to website, wireless access
Channel may vary widely quickly between point and website, i.e., channel is not in stable shape between wireless access point and website
State, stability is lower, then channel matrix can also have greatly changed at this time, thus wireless access point need to execute as early as possible it is next
Secondary channel detection, then wireless access point needs to shorten the time for executing channel detection next time, that is, reduce this channel detection with
Probe interval between channel detection next time.In this way, the embodiment of the present invention can determine detection according to the situation of change of channel
Interval, adjusts probe interval in real time, so that it is determined that the time of reasonable channel detection out, guarantees the efficiency of data transmission and accurate
Property.
One embodiment of the invention provides a kind of determination method of channel detection, can be used in the network architecture shown in Fig. 1
AP110, as shown in Fig. 2, this approach includes the following steps.
201, wireless access point executes the first channel detection to STA.
Wherein, wireless access point needs to carry out channel spy to it when by MU-MIMO mode to station transmission data
It surveys, and obtains the channel matrix of website by executing channel detection.
202, wireless access point executes second channel detection to the STA after executing the first channel detection, wherein the
The probe interval executed between the time for executing time and second channel detection and channel matrix variation negative of one channel detection
It closes, channel matrix changes the variation between the first channel matrix and second channel matrix, and the first channel matrix is wireless access
Point executes what the first channel detection obtained, and second channel matrix is the channel that wireless access point executes before the first channel detection
What detection obtained.
In the embodiment of the present invention, letter is determined by channel matrix variation between the first channel matrix and second channel matrix
Stable case of the road in the first channel detection, and then stable case of the channel after the first channel detection can be estimated out.So
Afterwards can according to estimate out stable case of the channel after the first channel detection determine the first channel detection the execution time and
The probe interval of second channel detection executed between the time.So after wireless access point executes the first channel detection, Ke Yigen
Channel is determined according to the channel matrix that channel detection obtains is executed before obtained the first channel matrix and the first channel detection
The variation of matrix, and then the probe interval between second channel detection can be determined and execute according to the variation of channel matrix,
It may thereby determine that out the time for executing second channel detection.
The variation hour of channel matrix increases this channel detection and next time probe interval, channel between channel detection
When matrix is changed greatly, reduce this channel detection and next time probe interval between channel detection.Therefore probe interval and channel
Matrixing is negatively correlated, i.e. the probe interval executed between the time for executing time and second channel detection of the first channel detection
Change with channel matrix negatively correlated.
Probe interval and channel matrix variation are negatively correlated, indicate that channel matrix variation is bigger, probe interval is smaller, channel square
Battle array variation is smaller, and probe interval is bigger.So the change threshold of channel matrix variation, root can be set in the embodiment of the present invention
The size of channel matrix variation is determined according to change threshold, and determines corresponding probe interval.In the embodiment of the present invention, according to letter
Matrix variation in road includes a variety of come the mode for determining probe interval.
For example, the change threshold and probe interval of channel matrix variation can be preset in the embodiment of the present invention
Preset value, preset value include at least two values.When determining channel matrix variation is greater than change threshold, probe interval takes default
Lesser value in value；When determining channel matrix variation is less than or equal to change threshold, probe interval is taken in preset value
Biggish value.
Since hour is got in channel matrix variation, illustrate that channel is more stable, i.e. the stability of channel is higher, it is possible to think
Channel continual and steady possibility after executing the first channel detection is higher, thus second channel detection can more late execution, i.e.,
Probe interval between the execution time of first channel detection and the execution time of second channel detection can be bigger.Similarly, by
When channel matrix variation is bigger, illustrate that channel is more unstable, i.e. the stability of channel is lower, it is possible to think that channel is being held
Continual and steady possibility is lower after the first channel detection of row, so second channel detection needs more early execution, i.e. the first channel
Probe interval between the execution time of detection and the execution time of second channel detection can be smaller.Therefore, the present invention is implemented
Different probe intervals can be determined according to the degree that channel matrix changes in example, when keeping channel matrix variation bigger between detection
Every smaller, it is bigger that channel matrix changes more hour probe interval.
For another example multiple channel matrixes can be preset in the embodiment of the present invention changes corresponding variation grades, and
The corresponding probe interval of each variation grades, channel matrix variation is bigger, and corresponding variation grades are higher, and corresponding probe interval is got over
It is small.After determining channel matrix variation, variation grades belonging to channel matrix variation are judged, and then determine according to variation grades
Corresponding probe interval.
For another example the change threshold of channel matrix variation and the change of probe interval can be preset in the embodiment of the present invention
Change step-length.When determining channel matrix variation is greater than change threshold, by the execution time of the first channel detection and the first channel
Probe interval reduces after change step as second channel detection and the between the execution time of the previous secondary channel detection of detection
The probe interval of one channel detection；When determining channel matrix variation is less than or equal to change threshold, by the first channel detection
The previous secondary channel detection for executing time and the first channel detection the execution time between after probe interval increases change step
Probe interval as second channel detection and the first channel detection.Wherein, change step can be pre-set fixed value,
Such as 1 millisecond.
In the example above, change step can also be changing value.
For another example the change threshold and channel matrix of channel matrix variation can be preset in the embodiment of the present invention
Corresponding relationship between variation and the change step of probe interval.When determining channel matrix variation is greater than change threshold, root
Corresponding change step is determined according to channel matrix variation and corresponding relationship, then by the execution time of the first channel detection and the
Probe interval is visited after reducing change step as second channel between the execution time of the previous secondary channel detection of one channel detection
Survey the probe interval with the first channel detection；When determining channel matrix variation is less than or equal to change threshold, according to channel
Matrix variation and corresponding relationship determine corresponding change step, then by the execution time of the first channel detection and the first channel
Probe interval increases after change step as second channel detection and the between the execution time of the previous secondary channel detection of detection
The probe interval of one channel detection.
It should be noted that it can also be non-linear that corresponding relationship, which can be linear corresponding relation, in the embodiment of the present invention
Corresponding relationship, specifically, corresponding relationship can be corresponding table, high-order moment, the function comprising items such as index, logarithms.Such as
This, the change step of probe interval can be adjusted according to the difference that channel matrix changes, and channel matrix variation embodies
The stable degree of channel, so the change step of probe interval can be changed according to the stable degree of channel.
In the embodiment of the present invention, second channel matrix is that the channel that wireless access point executes before the first channel detection is visited
It measures, the channel matrix obtained when the previous secondary channel detection of the first channel detection can be executed for wireless access point,
Or the obtained channel matrix of multiple channel detection that wireless access point executes before the first channel detection, for example,
Second channel matrix is the preceding obtained channel matrix of channel detection twice for executing the first channel detection.If second channel square
Battle array is the obtained channel matrix of multiple channel detection that the first channel detection of wireless access point executes before, then second channel square
Battle array includes multiple matrixes.At this time wireless access point can first calculate the first channel matrix respectively with each matrix in second channel matrix
Between variation, then determine that channel matrix changes according to the variation that calculates separately, specifically, channel matrix variation can be
The statistical value of the variation calculated separately, for example, average value.Wireless access point can also first calculate each matrix in second channel matrix
Statistical value (such as average value), letter is then determined according to the statistical value of matrix each in second channel matrix and the first channel matrix
The variation of road matrix.
In the embodiment of the present invention, obtained when being detected with the previous secondary channel that second channel matrix is the first channel detection of execution
Channel matrix for be illustrated.It include multiple elements in channel matrix, so channel matrix variation passes through in channel matrix
The situation of change of each element determines.
Specifically, wireless access point can be according to each member in element each in the first channel matrix and second channel matrix
The variation of element changes as channel matrix.
Specifically, with v(n)Indicate the first channel matrix, v(n-1)Indicate second channel matrix, aij(n)Indicate the first channel square
The element of i-th row, jth column, a in battle arrayij(n-1)Indicate that the element of the i-th row in second channel matrix, jth column, n are whole greater than 1
Number.kijIndicate aij(n)Opposite aij(n-1)Variation, k can be calculated according to formula (1)ijValue.It then can based on formula (1)
To calculate the variation of each element and each element in second channel matrix in the first channel matrix, and then obtain channel matrix
Variation.
In the embodiment of the present invention, after obtaining channel matrix variation, channel matrix variation is determined according to change threshold
When size, the variation that channel matrix can be changed to included each element is compared with change threshold.
When the variation of each element is compared with change threshold, if the variation that each element can be set is respectively less than
Or it is equal to change threshold, it is determined that channel matrix variation is less than or equal to change threshold；If the variation unevenness of each element is small
In or equal to change threshold, it is determined that channel matrix variation is greater than change threshold.If variation can also be arranged to be less than or equal to
The ratio of the total element number of number Zhan of the element of change threshold reaches preset ratio, it is determined that channel matrix variation is less than or waits
In change threshold；If the ratio that variation is less than or equal to the total element number of number Zhan of the element of change threshold is not up to default
Ratio, it is determined that channel matrix variation is greater than change threshold.If the average value that the variation of each element can also be arranged is less than
Or it is equal to change threshold, it is determined that channel matrix variation is less than or equal to change threshold；If the variation of each element is averaged
Value is greater than change threshold, it is determined that channel matrix variation is greater than change threshold.
The size of change threshold can be set according to concrete scene, for example, it can be set to rate of change value be 5%, 2% or
10% etc..The size of preset ratio can also be set according to concrete scene, for example, it can be set to preset ratio be 80% or
90% etc..
It should be noted that wireless access point, in the channel matrix obtained by channel detection, the value of some elements is logical
It is often zero, i.e., in the first channel matrix and second channel matrix, and value identical there are position is zero element, such as position
Element in the channel matrix upper right corner.For these elements, since its value is equal in the first channel matrix and second channel matrix
It is zero, then changing also is zero, so not acting on channel matrix variation, so can not be right when determining channel matrix variation
These elements are calculated, to reduce the time overhead of channel detection, improve the performance of system.
In a kind of embodiment of the embodiment of the present invention, channel matrix variation can be part member in the first channel matrix
Variation in element and second channel matrix between element corresponding with Partial Elements position.
In the embodiment of the present invention, Partial Elements can be same position and value in the first channel matrix and second channel matrix
The element being not zero.In the first channel matrix and second channel matrix, due to position is identical and value be zero element to letter
Matrix variation in road does not act on, so can not calculate these elements when determining channel matrix variation, to reduce
The time overhead of channel detection improves the performance of system.
Since channel matrix is usually larger, though determine channel matrix variation when can not to position identical and value
It is that zero element is calculated, calculative data volume is still larger, at this time can also be from the first channel matrix and second
In channel matrix except position is identical and value be zero element in addition to element in, then determine Partial Elements to calculate channel matrix
Variation, to further decrease the time overhead of channel detection, improves the performance of system.Determine that the mode of Partial Elements does not limit
It is fixed, the modes such as determining at random can be passed through.In order to guarantee to calculate the accuracy of result, the adjacent channel matrix of calculating twice becomes
Different elements can be chosen when change.In such a way that the Partial Elements in channel matrix are calculated, meter can be greatly reduced
System time expense needed for calculation process, so as to improve the efficiency that data are transmitted between AP and STA.
In the embodiment of the present invention, when channel matrix is changed greatly, then it can reduce the first channel detection and second channel detects it
Between probe interval.But channel matrix variation it is excessive when, illustrate that channel stability is poor, the degree of channel variation is larger, can be with
The degree estimated the first channel detection of execution and execute channel variation in the period between second channel detection also can be larger, this
When then need wireless access point to reduce probe interval as far as possible, i.e., frequently carry out channel detection, this, which will be reduced, wirelessly connects
The handling capacity of access point.So wireless access point can stop by way of MU-MIMO to STA when channel matrix changes greatly
Data are sent, in order to improve the handling capacity of wireless access point.
Specifically, the preset threshold of channel matrix variation can be set in the embodiment of the present invention, when the channel matrix changes
When greater than preset threshold, determine that channel matrix variation is excessive, wireless access point stops using the mode of MU-MIMO to send to STA
Data.
After obtaining channel matrix variation, whether wireless access point can determine channel matrix variation according to preset threshold
Excessive, i.e. whether judgement channel matrix variation is greater than preset threshold.
For example, channel matrix can be changed to wireless access point the variation of included each element and preset threshold carries out
Compare, to determine whether channel matrix variation is greater than preset threshold.
When the variation of each element is compared with change threshold, if the variation that each element can be set is all larger than
Preset threshold, it is determined that channel matrix variation is greater than preset threshold；If become alternatively, can also be arranged in the variation of each element
The number of elements changed greater than preset threshold reaches preset quantity, it is determined that channel matrix variation is greater than preset threshold；Alternatively, may be used also
It, can if reaching target proportion so that the ratio in the variation of each element greater than total element shared by the element of preset threshold is arranged
To determine that channel matrix variation is greater than preset threshold.
The size of preset threshold, preset quantity and target proportion can be set according to concrete scene.
As a kind of optional embodiment of the embodiment of the present invention, when too small due to probe interval, channel detection is excessively
Frequently, the handling capacity of AP equipment can be reduced, so the minimum threshold of probe interval can also be arranged in the embodiment of the present invention.Institute
When being less than minimum threshold with the probe interval determined when wireless access point, current probe interval can be determined as the first letter
The probe interval executed between the time for executing time and second channel detection of road detection, wherein current probe interval is
The probe interval of the previous secondary channel detection for executing time and the first channel detection of first channel detection executed between the time.
In the embodiment of the present invention, probe interval can be determined before executing step 202, the detection that then will be determined
Interval is compared with minimum threshold.If it is determined that probe interval is greater than or equal to minimum threshold, illustrate wireless access
When point executes second channel detection with this probe interval, the influence to AP handling capacity is smaller, then can be according to determining between detection
It is detected every executing second channel.If it is determined that probe interval is less than minimum threshold, between illustrating that wireless access point is detected with this
When executing second channel detection, to being affected for the handling capacity of AP, the handling capacity of AP is reduced, between detection current at this time
Every the probe interval executed between the time for executing time and second channel detection for being determined as the first channel detection, according to current
Probe interval execute second channel detection.
The minimum threshold of probe interval can be set according to concrete scene.
In the above-described embodiments, when the probe interval determined when wireless access point is less than minimum threshold, illustrate channel
Stability is poor, and the degree of channel variation is larger, can estimate execute the first channel detection and execute second channel detection when
Between the degree of channel variation also can be larger in section, then can also stop sending number to site STA by way of MU-MIMO at this time
According to improve the handling capacity of AP.
As a kind of optional embodiment of the embodiment of the present invention, since channel detection needs to obtain accurate channel square
Battle array, so being passed before channel detection next time using the channel matrix that previous secondary channel detects when probe interval is excessive
Transmission of data, it is possible that the situation of inaccuracy, so the max threshold of probe interval can also be arranged in the embodiment of the present invention
Value.So maximum threshold can be determined as first when the probe interval that wireless access point determines is greater than maximum threshold
The probe interval executed between the time for executing time and second channel detection of channel detection.
In the embodiment of the present invention, probe interval can be determined before executing step 202, the detection that then will be determined
Interval is compared with maximum threshold.If it is determined that probe interval be greater than maximum threshold, illustrate the spy of channel detection
Survey interval is excessive, then what the execution time and second channel that maximum threshold can be determined directly as to the first channel detection detected
The probe interval between the time is executed, to avoid channel cycle excessive.If it is determined that probe interval be less than or equal to most
Big threshold value can then be held using the probe interval determined as what the execution time of the first channel detection and second channel detected
Probe interval between the row time.The maximum threshold of probe interval can be set according to concrete scene.
In the embodiment of the present invention, wireless access point is according to the variation between the first channel matrix and second channel matrix come really
The probe interval executed between the time for executing time and second channel detection of fixed first channel detection.Channel matrix
Situation of change illustrates the stable case of channel between AP and STA, and the variation of usual channel matrix is bigger, illustrates AP and STA
Between channel stability it is lower, need to carry out channel detection in time；The variation of channel matrix is smaller, illustrate AP and STA it
Between channel stability it is higher, can suitably postpone execute second channel detection time, so the execution of the first channel detection
The probe interval executed between the time and channel matrix variation of time and second channel detection are negatively correlated.So the present invention is implemented
In example, the period that wireless access point is detected according to the situation of change realtime adjusting channel of channel matrix, when ensure that channel detection
Between reasonability.
In the embodiment of the present invention, the case where being changed by channel matrix the probe interval to channel detection carry out dynamic tune
It is whole, in the higher situation of channel stability, increase the probe interval of channel detection, so that the rate of improve data transfer, increases
Big data throughput gain；In the lower situation of channel stability, reduce the probe interval of channel detection, to guarantee data
The quality of transmission.
Fig. 3 is the schematic block diagram of the determining device 300 of channel detection according to an embodiment of the invention.As shown in figure 3,
The device 300 includes:
Probe unit 301, for executing the first channel detection to STA；
The probe unit 301 is also used to execute second channel to the STA after executing first channel detection
Detection, wherein first channel detection executes between time and the detection of second channel detection executed between the time
Negatively correlated every changing with channel matrix, the channel matrix changes the change between the first channel matrix and second channel matrix
Change, the first channel matrix wireless access point executes first channel detection and obtains, the second channel square
Battle array is what the channel detection that the wireless access point executes before first channel detection obtained.
In the embodiment of the present invention, device 300 is determined according to the variation between the first channel matrix and second channel matrix
The probe interval executed between the time for executing time and second channel detection of first channel detection.The change of channel matrix
Change situation and illustrate the stable case of channel between AP and STA, the variation of usual channel matrix is bigger, illustrate AP and STA it
Between channel stability it is lower, need to carry out channel detection in time；The variation of channel matrix is smaller, illustrates between AP and STA
The stability of channel is higher, the time for executing second channel detection can be suitably postponed, so when the execution of the first channel detection
Between it is negatively correlated the probe interval of second channel detection executed between the time and channel matrix variation.300 basis of such device
In the period of the situation of change realtime adjusting channel detection of channel matrix, it ensure that the reasonability of channel detection time.
It is understood that the channel matrix variation is Partial Elements and second letter in first channel matrix
Variation in road matrix between element corresponding with the Partial Elements position.
Fig. 4 is the schematic block diagram of the determining device 300 of the channel detection of another embodiment according to the present invention.
It is understood that as shown in figure 4, described device 300 can also include:
Transmission unit 302, for stopping using the side of MU-MIMO when channel matrix variation is greater than preset threshold
Formula sends data to the STA.
The determining device 300 of channel detection according to an embodiment of the present invention, can correspond to letter according to an embodiment of the present invention
Executing subject in the determination method of road detection, and the modules in the determining device 300 of channel detection above-mentioned and its
Its operation and/or function is respectively in order to realize the corresponding process of each method in Fig. 2, for sake of simplicity, details are not described herein.
Fig. 5 is a kind of schematic block diagram for wireless access point 400 that an embodiment provides according to the present invention.As shown in figure 5,
Wireless access point 400 includes processor 401 and transceiver 402.Processor 401 may include central processing unit (CPU), at network
It manages device (NP), radio frequency (RF) circuit, specific integrated circuit (ASIC), programmable logic device (PLD) or any combination thereof.It is above-mentioned
PLD can be Complex Programmable Logic Devices (CPLD), field programmable gate array (FPGA), Universal Array Logic
(GAL) or any combination thereof.Radio circuit is also referred to as RF module, is the electronics device that equipment room sent and/or received wireless signal
Part.Each circuit in processor can be independent, also can integrate on one or more chips.
Transceiver 402 can be antenna.The antenna may include array antenna, multiband aerial, microstrip antenna, orientation day
Line or any other type antenna.The 402 transmitting/receiving wireless signal of transceiver of processor 401.
Optionally, wireless access point 400 further includes memory.Memory, which can be independent device also and can integrate, to be located
It manages in device 401.Memory may include volatile memory, such as random access memory (RAM).Memory also may include
Nonvolatile memory, such as read-only memory (ROM), flash memory, CD, tape, floppy disk, hard disk or solid state hard disk.
Memory can also include any combination of the memory of mentioned kind.If processor 401 needs program code, memory can
To store program code, and the program code is transferred to processor 401, so that finger of the processor 401 according to program code
Show the realization embodiment of the present invention.
Wireless access point 400 according to an embodiment of the present invention, can correspond to channel detection according to an embodiment of the present invention
Determine the executing subject in method, and each operation and/or function in wireless access point 400 is respectively in order to realize in Fig. 2
The corresponding process of each method, for sake of simplicity, details are not described herein.
In the above-described embodiments, it can be realized wholly or partly by software, hardware or a combination thereof.When using soft
When part is realized, can entirely or partly it realize in the form of a computer program product.The computer program product includes one
A or multiple computer instructions.When loading on computers and executing the computer program instructions, entirely or partly generate
According to process or function described in the embodiment of the present invention.The computer can be general purpose computer, special purpose computer, computer
Network or other programmable devices.The computer instruction may be stored in a computer readable storage medium, or from one
A computer readable storage medium is transmitted to another computer readable storage medium, for example, the computer instruction can be from
One web-site, computer, server or data center pass through wired (such as coaxial cable, twisted pair, optical fiber) or wireless
(such as infrared, wireless, microwave etc.) mode is transmitted to another web-site, computer, server or data center.Institute
Stating computer readable storage medium can be any usable medium or include that one or more can that computer can access
The data storage devices such as server, the data center integrated with medium.The usable medium can be magnetic medium, (for example, soft
Disk, hard disk, tape), optical medium (for example, CD) or semiconductor medium (such as solid state hard disk) etc..
Claims (10)
1. a kind of determination method of channel detection characterized by comprising
Wireless access point executes the first channel detection to site STA；
The wireless access point executes second channel detection to the STA after executing first channel detection, wherein institute
State the probe interval and channel matrix executed between the time for executing time and second channel detection of the first channel detection
Variation is negatively correlated, and the channel matrix changes the variation between the first channel matrix and second channel matrix, first letter
The matrix wireless access point in road executes first channel detection and obtains, and the second channel matrix wirelessly connects to be described
What the channel detection that access point executes before first channel detection obtained.
2. the method according to claim 1, wherein channel matrix variation is in first channel matrix
Variation in Partial Elements and the second channel matrix between element corresponding with the Partial Elements position.
3. method according to claim 1 or 2, which is characterized in that further include:
When channel matrix variation is greater than preset threshold, the wireless access point stops using multi-user-multi input how defeated
The mode of MU-MIMO sends data to the STA out.
4. a kind of determining device of channel detection characterized by comprising
Probe unit, for executing the first channel detection to site STA；
The probe unit is also used to after executing first channel detection execute the STA second channel detection,
In, the probe interval and channel executed between the time for executing time and second channel detection of first channel detection
Matrix variation is negatively correlated, and the channel matrix changes the variation between the first channel matrix and second channel matrix, and described the
The one channel matrix wireless access point executes first channel detection and obtains, and the second channel matrix is the nothing
What the channel detection that line access point executes before first channel detection obtained.
5. device according to claim 4, which is characterized in that the channel matrix variation is in first channel matrix
Variation in Partial Elements and the second channel matrix between element corresponding with the Partial Elements position.
6. device according to claim 4 or 5, which is characterized in that further include:
Transmission unit, for stopping using multi-user-multiple-input and multiple-output when channel matrix variation is greater than preset threshold
The mode of MU-MIMO sends data to the STA.
7. a kind of wireless access point, which is characterized in that including processor and transceiver；
The processor is used to execute the first channel detection to site STA by the transceiver；
The processor is also used to after executing first channel detection execute second to the STA by the transceiver
Channel detection, wherein the spy executed between the time for executing time and second channel detection of first channel detection
It surveys interval and channel matrix variation is negatively correlated, the channel matrix variation is between the first channel matrix and second channel matrix
Variation, the first channel matrix wireless access point execute first channel detection and obtain, the second channel
Matrix is what the channel detection that the wireless access point executes before first channel detection obtained.
8. device according to claim 7, which is characterized in that the channel matrix variation is in first channel matrix
Variation in Partial Elements and the second channel matrix between element corresponding with the Partial Elements position.
9. device according to claim 7 or 8, which is characterized in that the processor is also used to become when the channel matrix
When changing greater than preset threshold, stop in such a way that the transceiver is using multi-user-multiple-input and multiple-output MU-MIMO to described
STA sends data.
10. a kind of computer readable storage medium, which is characterized in that instruction is stored in the computer readable storage medium,
When described instruction is run on computers, so that computer executes the channel of any one of claim 1-3 such as and visits
The determination method of survey.
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| WO2023221129A1 (en) * | 2022-05-20 | 2023-11-23 | 深圳传音控股股份有限公司 | Channel detection method, communication device, and storage medium |
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